Valve for water-heaters.



B. R. PARROTT. VALVE FOR WATER HEATERS.

APPLICATION FILED JULY 11, 1910.

984,440. Patented Feb. 14, 1911.

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wumtoz avity-mama If I r ji P no BERT B. PABROTT, 0F JACKSON, MICHIGAN.

VALVE FOR WATEKHEATERS.

Specification of Letter: Iatent.

Patented Feb. 14, 1911.

Application filed July 11, 1910. Serial 1%. 571,375.

To all whom it may concern:

lie it known that 1, Bear R. PARROTT, a citizen of the United States of America, residing at Jackson, in the county of Jackson and State of ichigan, have invented certain new and useful Improvements in Valves for Water-l-Icatcrs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable otliers'skilled in the art to which it a ipertains to make and use the same.

lily invention relates to improvements in automatic valves, for water heaters, and its object is to provide improved means for iroportioning the flow of gas to the main burner, according to the quantity of water flowing through the heater, to provide for automatically controlling the pilot-light to reduce the amount of gas tlowin'g thereto when the heater is idle, and to increase the flow of gas to the pilot-light when the main burner is to be lighted and to n-ovide the device with various new and usef ul features, hereinafter more fully described and particularly pointed out in the claims.

My device consists essentially of a piston adjusted'by the water llowun through the device and a gas valve of IIOVOFCOXIStl'liC- tion, adjusted by said piston, to control the flow of gas to the main burner and 'to proportion the same to the flow of water, and also to throttle down the pilot-light to a minimum 'whciievor thc water not flowing through the device. and in various features of construction and arrangement, as will. more fully appear by reference to the accompanying drawings, in which Figure 1 is a side elevation of a device embodying my invention; Fig. 2 a vertical section of the same; Fig. 3 an enlarged sectional detail of the piston; Fig. 4 au inverte'd plan view of the same; and Fig. 5 is a detail of the gas valve closed.

. Like numbers refer to like parts in all of the figures.

1 representsa cylinder, and 2 a valve case connected by ayoke 1, whereby they are sure to remain in accurate alinement.

8 is the water inlet at the bottom of the cylinder 1, and l the outlet at the top of the same. v

5 is the gas inlet at the bottom of the valve chamber 2 and (i the gas outletat the top of the said chamber. the main burner from the outlet (5, an from a supply to the inlet 5, the water .to be The gas is pi ed to heated is piped from any suitable supply to the opening 3, and to the heater (not shown) from the opening 4.

The drawing shows the device with the parts positioned as when a moderate stream of water is flowin through to be heated.

7 is an inverte cup-shaped piston movable in the cylinder 1, the u per part of which cylinder is of nlar ed iameter, and the lower art fitted close y about the piston. In tie wall of the iston are longitudinal slots 7 which permit the water below the piston to escape therethrough in greater or lesser quantities as the piston rises more or less. The greater the flow of water, I

the higher-this piston rises. A spring 9 engages the piston and moves the same downward as the flow of water ceases.

To promptly equalize the pressure at each side of the piston and perm t the spring to thus act, a small vent 21 is provided in the piston, closed more or less by'a screw 22 to adjust the fiow therethrough. A rod 10 attached to the piston, extends upward through a suitable gland, and is adjustably coupled to a like rod 16 by an adjustable coupliin 17 to operate the gas valve. The valve chamber is divided by a horizontal partition into lower and upper chambers, respectively communicating with the openings 5 and 6. Inthis partition is a tubular opening 13 having a valve seat 12 at the top. The valve is provided with a closin member 11 to engage the seat 12,'and who ly stop the fiow'of gas to the main burnerwhenover water ceases to flow through the piston and the same descends, Below the closing member ,11 is a cylindrical ortion 14 fitting loosely in the cylindricaF -openiug when lowered within the same, whereby the flow of gas to both the pilot-light and burner is throttled, but not wholly shut oil. 18--is a tube extending to the ilot-light, and communicating with the to ular opening 13, by a small passage 20, and 19 is 'a screw in the said passage to adjust the maximum flow therethrough.

In operation ;--when water is drawn through the heater itreduces the pressure above the piston, permitsthe sameto rise.

and compress the spring 9 .more or less according to the amount of water passing through the slots 7. This opens the gas valve and first turns on the maximum flow of gas to the pilot light and a. moderate flow of gas Q the burner, and after ignition at the burner as the gas valve rises further the 1. water heater valve, t'tililptl.-lb a The proportion of gas aml \vater i'. :Hljltntttl ing amt closing said valve.

conical. part 15, comes oppo ite the seat [2 and thus the space between the same is increased. The gas is thus turned on to the main burner more or less according as more or less water is drawn through the piston.

as occasion requires, by adjusting the coupling 17 to change the tixed distance between the water piston and the gas valve. 5 \l'henever the water-ceases to flow andhold l up the pi.-:ton the spring 3. lowers the piston and closes the gas valve, \vholly shutting oil the main burner and throttling the pilot light, to,a mininunn whereby but little gas is required to keep it burning and ready for action whenever water is drawn through the device again.

It will he noted that the cylimlrical portion 1% of the valve while in the tubular portion 13 of the partition checks the adtnimsiott of gas to the burner so that but a limited amount is admitted at lirst, and thatthe pilot-light is turned on fully before the burner supply iainat'erially lllt'ltitr'ttl. This prevents attiy e.\plo 7i\'e lighting of the burner. Also, that the valve dett'l'ntltn's the reduced flow to the 'lilot' light aml the .-.erew 1!), adjusts the maximum flow to the same.

What I claim i.-s;-

valve ease having a main passage to admit 1 gas to the main burner, amt a lateral opening eonununieating with the main llll fitlgu to admit, gas to a pilot-light; a valve adapted to \vholly' close the mam pass go to simultaneou-ly partially ttlm e the lateral opening to shut oti' the flow to the main burner aml determine the minimum (low to the pilotligltt, and adjustable lltt'ttllS in the lateral passa e to determine the maxinnnn llo\\' to the pilot-light when the valve is opened.

2. A Witter heater valve, comprising .a valve case'having a main opening to admit gas to a burner and a l leral opening romllltlltltttltlllg with the main opening to admit gas to a pilot-light, a valve ada ted to wholly chm: the main opening. aml partially l cloao the lateral opening when said valve i.-: closed and to lir.-.t. \vholly open the lateral opening and then to variably open the main opening, and nnrana for autonnttically opene l 3. A water valve, comprising a valve casl mg having a parlnton therein providedl l vwith a tubular opening having a valve seat at one end, and a lateral opening conununieating with the tubular opening; a valve having a closing member to engage the'seat', a throttling cylindrical portion and an adjusting conical portion movable. within the tubular opening and out of the same to a position with the conical p n-lion opposite the valve seat and means for adjusting #:titl

- valve.

4. A water heater valve, comprising a valve ease having inlet and outlet openings atopposite ends, a partition in said case havin; an axial opening. and a valve seat at one end, said case also having a lateral pa sage, communicating with the axial opening, an adjustable member in said ])it. '2l 1 to control the maxinnnn llovv tltc-etin'ongh, a valve, movable in ;-';litl axial opening, adapted at one end to engage the .-eat. and wholly close said opening and having a middle portion adapted to partially -lo.-,e both the.

opening and the pa age. and having a conical end, adapted to variably adjustand control the llovv through the axial opening, aml means for auto|mttieall opening and closing the valve.

A water heater valve. comprising a gaa \alve having a elo.-in member at one \lltl to \vholl v abut oll' 'a.- from the. main burner. a cylindrical middle portion t throttle the pilot-light, and a conical portion at the other end to regulate the lltnv oli gas to the main burner, a caring having inletand outlet openings at its re.- peeiivoemb, a partition in the casing havine a tubular opening and a valve seat at one end of .aid opening. aml also havin; a passage for a pilot light comtuunicating with said opening, and means for adjusting the maxinnnn H w of gas t the pilot-light. th ough the lateral opening.

ti. water h ater \al\e, comprising a valve hamb r having a partition and inlet nlnl Outlet openings at the teapot-live al ies olthe partition, -aid partitimi al-o having a main opening lhvrethrongh and. a lztlt-t'ul opening: to admit ga to a pilot light, a valve adapted to \\'l\. \ll t'lo-t. th main opening and to partially chm llulateral opening \\'ltt'l| t-low'l and lo \vlnvll) open the latera op ning and adjust th main opening nhen open d, and mean l'or ad u-lin th maxi mum [low f gas to the pilot light.

in testimony \vhereol' l allix my .-:i ;n:|tnre Hit 

